Fedora 45 is now available, and it brings a coordinated refresh of all five of the project's atomic desktop variants: Silverblue, Kinoite, Sway Atomic, Budgie Atomic and COSMIC Atomic. Because the atomic desktops ship alongside the main Fedora release rather than on independent mid-cycle tracks, version 45 represents a single, synchronised upgrade across the entire lineup — a cadence that matters to teams standardising on one desktop baseline.
According to Fedora Magazine's coverage of this release, the headline change shared by all five variants is the completed migration to Fedora's new forge. With that move finished, the atomic desktops now sit on the same hosting infrastructure as the rest of the distribution, closing out a transition that had been in progress across Fedora's tooling.
For IT organisations weighing atomic desktops for endpoint manageability, the appeal lies in the operating model rather than any single desktop's feature list. An immutable OS keeps the base image essentially read-only: updates replace the whole image atomically, and rollback means returning to a previous deployment rather than repairing a partially upgraded system. On Fedora's atomic desktops, administrators who need software beyond the base image and Flatpak applications can use rpm-ostree to layer packages on top — but layered packages sit outside the base image, which means they persist across image updates and must be re-examined when the underlying platform moves forward. For teams chasing reproducible development environments, the practical lesson is that the cleanest builds are the ones that avoid layering altogether.
Two variants warrant particular attention this cycle. Sway Atomic gives tiling-compositor users an immutable option within the official lineup, broadening Fedora's atomic coverage beyond the traditional GNOME and KDE Plasma offerings. COSMIC Atomic tracks System76's Rust-based desktop, and readers evaluating it for production use should check its current stability status before committing.
Silverblue and Kinoite, the GNOME- and KDE-based flagships of the atomic family, continue on their established trajectories this cycle without headline-grabbing changes. That consistency is relevant to deployments: a predictable, repeating upgrade path is a precondition for treating an image-based desktop as a long-term endpoint target.
What stands out in Fedora 45's atomic lineup is the alignment itself — five variants, one release cycle, one forge. For administrators designing fleets of managed endpoints and developers building machine-reproducible toolchains, that synchronisation is the first thing they will notice.
Glossary / 名詞對照
- 唯讀作業系統（Immutable OS）: An operating system whose base image is treated as read-only, updated as a complete unit rather than modified package by package.
- rpm-ostree: A tool for composing and deploying OS images that can also "layer" additional packages on top of the base image; layered packages persist independently of the base and are handled separately during updates.
Fedora 45 正式發布，同步更新項目旗下五款原子桌面（atomic desktop）版本：Silverblue、Kinoite、Sway Atomic、Budgie Atomic 與 COSMIC Atomic。由於原子桌面版本與 Fedora 主版本同步出貨，而非走上各自獨立的中期更新軌道，45 版代表整個產品線的一次性同步升級——對希望統一桌面基線的團隊而言，這種出貨節奏正是關鍵所在。
據 Fedora Magazine 對這次發布的報道指出，五個版本共同的重點變更，是完成向 Fedora 全新 forge 的遷移。這項轉換完成後，原子桌面現已與發行版其餘部分共用同一套託管基礎設施，為 Fedora 各項工具持續進行的轉移劃上句號。
對評估以原子桌面提升端點管理能力的 IT 組織而言，吸引力在於運作模式，而非任何單一桌面的功能清單。唯讀作業系統（immutable OS）把基本映像維持為只讀：更新以原子方式整體替換映像，回復（rollback）則是返回先前的部署，而非修補升級到一半的系統。在 Fedora 的原子桌面上，管理員如需基本映像及 Flatpak 應用程式以外的軟件，可用 rpm-ostree 在頂部疊加套件——但疊加套件位於基本映像之外，意味著它們會在映像更新後持續保存，並須在底層平台推進時重新檢視。對於追求可重現開發環境的團隊，實務上的結論是：最穩健的建置方式，就是完全不疊加套件。
本週期有兩個版本尤為值得留意。Sway Atomic 為平鋪式合成器（tiling compositor）用戶在官方產品線中提供唯讀選擇，擴大 Fedora 原子版本的覆蓋範圍，不再局限於傳統的 GNOME 及 KDE Plasma 選擇。COSMIC Atomic 則追蹤 System76 以 Rust 開發的桌面，讀者如考慮將其用於正式環境，應先確認目前的穩定程度再作決定。
作為原子家族以 GNOME 及 KDE 為基礎的旗艦版本，Silverblue 及 Kinoite 本週期大致沿既定路線推進，未有搶眼變動。這種一致性對部署別具意義：可預期、重複的升級路徑，是把基於映像的桌面當作長期端點目標的先決條件。
Fedora 45 原子產品線最突出之處，正是整體的同步性——五個版本、一個發布週期、一個 forge。對於規劃受管端點機群的管理員，以及建構機器可重現工具鏈的開發者而言，這種同步性將是他們首先注意到的事情。
Glossary / 名詞對照
- 唯讀作業系統（Immutable OS）: 基本映像被視為只讀的作業系統，更新時以完整單元整體替換，而非逐一套件修改。
- rpm-ostree: 用於組裝及部署作業系統映像的工具，亦可在基本映像之上「疊加」額外套件；疊加套件獨立於基本映像保存，更新時另行處理。